﻿//-----------------------------------------------------------------------
// <copyright file="SerializableDictionary.cs" company="INL sprl">
//     Copyright 2009-2010 INL sprl.
// </copyright>
//-----------------------------------------------------------------------

namespace ParseXAML
{
    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Xml.Serialization;
   
    /// <summary>
    /// Permet de sérializer un dictionnaire.
    /// </summary>
    /// <remarks>
    /// Code repris de http://weblogs.asp.net/pwelter34/archive/2006/05/03/444961.aspx
    /// </remarks>
    /// <typeparam name="TKey">Type de la clé pour une ressource</typeparam>
    /// <typeparam name="TValue">Type pour la valeur d'une ressource</typeparam>
    [XmlRoot("dictionary")]
    public class SerializableDictionary<TKey, TValue>
        : Dictionary<TKey, TValue>, IXmlSerializable
    {
        #region IXmlSerializable Members

        /// <summary>
        /// Récupère le schéma (à implémenter, renvoie null pour le moment)
        /// </summary>
        /// <returns>Renvoie le schéma</returns>
        public System.Xml.Schema.XmlSchema GetSchema()
        {
            return null;
        }

        /// <summary>
        /// Lit le contenu du dictionnaire
        /// </summary>
        /// <param name="reader">Stream qui contient l'objet sérializé</param>
        public void ReadXml(System.Xml.XmlReader reader)
        {
            XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
            bool wasEmpty = reader.IsEmptyElement;
            reader.Read();
            if (wasEmpty)
            {
                return;
            }

            while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
            {
                reader.ReadStartElement("item");
                reader.ReadStartElement("key");
                TKey key = (TKey)keySerializer.Deserialize(reader);
                reader.ReadEndElement();
                reader.ReadStartElement("value");
                TValue value = (TValue)valueSerializer.Deserialize(reader);
                reader.ReadEndElement();
                this.Add(key, value);
                reader.ReadEndElement();
                reader.MoveToContent();
            }

            reader.ReadEndElement();
        }

        /// <summary>
        /// Ecrit le contenu du dictionnaire
        /// </summary>
        /// <param name="writer">Stream où doit être sérializé l'objet</param>
        public void WriteXml(System.Xml.XmlWriter writer)
        {
            XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
            foreach (TKey key in this.Keys)
            {
                writer.WriteStartElement("item");
                writer.WriteStartElement("key");
                keySerializer.Serialize(writer, key);
                writer.WriteEndElement();
                writer.WriteStartElement("value");
                TValue value = this[key];
                valueSerializer.Serialize(writer, value);
                writer.WriteEndElement();
                writer.WriteEndElement();
            }
        }

        #endregion
    }
}